Fix ipa-restore (python2)
In order to stop tracking LDAP server cert, ipa-restore is using
dse.ldif to find the certificate name. But when ipa-server-install
--uninstall has been called, the file does not exist, leading to a
IOError exception (regression introduced by 87540fe).
The ipa-restore code properly catches the exception in python3 because
IOError is a subclass of OSError, but in python2 this is not the case.
The fix catches IOError and OSError to work properly with both version.
Fixes:
https://pagure.io/freeipa/issue/7231
Reviewed-By: Rob Crittenden <rcritten@redhat.com>